威胁打击方向对飞机油箱液压冲击易损性的影响分析  

IMPACT ANALYSIS OF THREAT DIRECTIONS TO HYDRODYNAMIC RAM VULNERABILITY OF AIRCRAFT FUEL TANK

作　　者：陈亮[1] 宋笔锋[1] 裴扬[1] 金朋[1] 

机构地区：[1]西北工业大学航空学院,西安710072

出　　处：《机械强度》2012年第6期807-811,共5页Journal of Mechanical Strength

基　　金：国家自然科学基金(11102159);西北工业大学"翱翔之星"计划及基础研究基金(NPU-FFR-JC20100221)资助~~

摘　　要：威胁传播物击中非空油箱导致的液压冲击杀伤模式是飞机最主要的杀伤模式之一,研究不同方向威胁造成的燃油液压冲击和油箱动态响应有助于确定油箱薄弱环节和主要威胁方向。应用PAM-Crash碰撞仿真系统对破片撞击油箱的情况进行分析,利用SPH(smoothed particle hydrodynamics)方法解决燃油与壁板的流固耦合问题,通过对比不同打击方向下油箱的损伤情况,确定典型飞行状态下的主要威胁方向。结果表明:不同打击方向对非空油箱造成的杀伤程度存在显著差异;飞行和燃油状态对飞机主要威胁方向、易损面积和杀伤概率具有较大影响,平飞时上方威胁具有更大的危害性,机动倾斜时翼面两侧方向都成为主要威胁方向,且威胁水平最高。Hydrodynamic Ram （HRAM） is one of the mostserious damage modes to military aircraft, and researching tanks＇ dynamic response is helpful for identifying high risk region and critical threat directions. In simulating the HRAM of fragments impacting metal fuel tanks the PAM-Crash is employed, in solving the fluid-structure interaction the smoothing particle hydrodynamics （SPH） method is used, and then critical threat directions under typical flight modes were confirmed. Results indicate： impacting directions can influence damage degree; flight and fuel conditions have effect on critical threat directions, vulnerable area and kill probability; when an aircraft is in level, threats from upside are more critical; when it maneuvering to vertical climb/dive or horizontal hover, both sides of wings are critical directions and the most critical conditions will occur.

关 键 词：液压冲击 油箱 易损性 SPH(smoothed PARTICLE hydrodynamics) 威胁方向 

分 类 号：V221[航空宇航科学与技术—飞行器设计] TB122[理学—工程力学]